Leasing has begun at The Arlington, a new luxury rental property in Boston’s Back Bay neighborhood. Boston.com was given a private tour of the Back Bay landmark that has been remodeled to as a joint venture between Related Companies and The Congress Group. The building has 13 floors and a total of 128 modern 1- and two-bedroom residential units. Rents start at $3,200 a month and include a long list of amenities. The building is located a few blocks from the Public Garden, Copley Square, and Newbury Street shops. Take a look inside.